Physics MCQs

Page No. 68

On loading the prong of a tuning form with wax its frequency____________________?


a increases

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bdecreases

✓


cremains unchanged

✖


dmay increase or decrease

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View Answer decreases

Increase in velocity of sound in the air for 1°C rise in temperature is_________________?


a1.61 ms-1

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b 61.0 ms-1

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c0.61 ms-1

✓


d 2.00 ms-1

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View Answer 0.61 ms-1

Sound waves do not travel in vacuum because ___________________?


athey are transverse waves

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bthey are stationary waves

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cthey require material medium for propagation

✓


dthey do not have enough energy

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It is possible to distinguish between transverse and longitudinal waves form the property of __________________?


a refraction

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bpolarization

✓


cinterference

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ddiffraction

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View Answer polarization

If stretching force T of wire increases, then its frequency __________________?


adecreases

✖


bincreases

✓


cremains the same

✖


d any of above

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View Answer increases

When two identical traveling waves are superimposed, the velocity of the resultant wave__________________?


adecreases

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b increases

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cremains unchanged

✓


dbecomes zero

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View Answer remains unchanged

The waves that require a material medium for their propagation are called__________________?


a matter waves

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belectromagnetic waves

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ccarrier waves

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dmechanical waves

✓


View Answer mechanical waves

Which phenomena can be applied to estimate the velocity of star with respect to earth


aDopplers effect

✓


bInterference of waves

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cBeats phenomena

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dAll of these

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View Answer Dopplers effect

The speed of stationary waves in a stretched string are independent of___________________?


aNumber of loops

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bTension in the string

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c Point where string is plucked

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dboth A and C

✓


View Answer both A and C

The speed of sound in hydrogen is _____________ time than that in oxygen?


aTwo times

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bThree times

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c Four time

✓


dSix time

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View Answer Four time

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